Type-writer



(No Model.) 2 sheets-sheet 2.

J. BRADY.

.TYPE WRITER.

No. 439,998. Patented Nom/1, 1890.

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JAMES BRADY, OF BROOKLYN, NEW YORK, ASSIGNOR TO THE FITCH TYPE- WRITER COMPANY, OF DES MOINES, IOVA.

TYPE-WRITER.

SPECIFICATION forming part of Letters Patent No. 439,998, dated November 4, 1890.

Application iiled July 22, 1889. Serial No. 318,231. (No model.)

To a/ZZ whom it may concern:

Be it known that I, JAMES BRADY, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Type-Writers, of which the following is a specification.

My invention, while applicable to various forms of type-writers, is particularly .intended for those in which writing is done on top of a cylindrical (or approximately cylindrical) platen.

The invention relates to devices for holding the paper against the platen; and it consists, specifically, in means connecting together the paper-holding or paper-clamping devices at front and rear of the platen, so that a simultaneous operation of the two can be eifected by force applied to either.

The drawings are largely diagrammatic in their nature.

Figure 1 is an end elevation of a paper-carriage having one form of my invention applied thereto. Fig. 2 is a similar view showing another form. Fig. 3 is a plan view of the form represented in Fig. l.

The paper-carriage l, with its platen 2, may be. of any description. The drawings are intended to represent the end of a cylindrical platen, which is customarily made of wood covered by rubber of suitable hardness and thickness.

All the details outside of the paper-clamping devices are omitted. The clips 4or pressing devices proper may consist of bars, rollers, or plates, but are preferably as represented in the accompanying drawings, in which- 3 is a paper-pressing bar or plate adapted to bear on the front side of the platen, and 4 is a roller adapted to bear on the rear side of the platen, both extending preferably the whole length of the platen and so holding the paper closely thereon throughout its whole extent. The bar 3 is graduated, as shown, so that its function of pressing the paper on the platen is supplemented by that of a scale, whereby the location of a letter on a line is ascertained. The said clips 3 and 4 are mounted in shiftable supports so articulated or having such positive connection with one another that the shift of either toward or from the roller-platen is accompanied by a corresponding movement of the other.

My preferred arrangement for securing the above simultaneous movements will now be explained. The bar 3 and roller 4 are carried on the upper ends of arms 5 of two similar bent levers, which are pivoted at 6 to the paper-carriage. They have arms 7 projecting toward each other and connected by pin 8 and slot 9. They have also other arms 10 projecting outward from their pivots and receiving ends of a stretched spiral spring 1l. It will now be seen tha-tif either of the arms 5 is pulled away from the platen to the position shown in` dotted lines it will by the positive articulated connection 6 8 9 operate the other arm 5 in the opposite direction, and will by so doing open a space for the admission of the paper. When in this position, the spring ll, having passed below the pivots 6 of the arms 5, as shown in dotted lines, will now hold the parts open until the paper has been inserted. Pressure of either of the arms 5 toward the platen will then bring the bar 3 and roller 4 down upon the paper, pressing it closely against the platen, and the spring 11, as soon as it passes above pivot 6, will assist the clips in resuming and retaining the closed position.

In the form of the invention shown in Fig. 2 the spring 11a operates in like manner through the positive connections 5 6 7 8 9 to close both clips simultaneously, and the same positive articulated connection is in like manner availed of to hold the clips simultaneously in the open position; but in this form I employ a finger-lever l2, pivoted at 13 to the carriage and having a cam 14, adapted to bear under the arms 7 and press them up to the position shown in dotted lines, so as to separate the bar 3 and roller 4 from the platen. As in this form the spring constantly tends to close the clip, elevation of said lever allows the parts to resume the forward position shown in full lines. The relative length of the arms 7 may be varied, if desired, to change the relative amount of opening of the paper-clamping devices at front and back of the paper. As, for example, if it be desired that the bar IOO 3 open farther than roller 4, the front arm 7 should be made shorter and the rear arm longer than here shown.

While illustrating these two forms of my invention, [do not consider that they are by any means all the forms which it may take, as they may be amplified indefinitely so long as the underlying principle is retained of a clamping device on one side of the platen simultaneously with and by force applied to that on the other side. The arrangement of the spring for holding the parts may also be subject to various modifications Within the scope of my'invention, which embraces the idea of employing a spring for holding both the clamping devices away from the platen r against the platen, according tothe position of the part-s.

Havingthus described my inventi0n,the following is what I claim as new therein and desire to secure by Letters Patent:

1. The combination of a platen, the paperclamping devices arranged on both sides thereof and connected together, and the spring connected to said clamping device and adapted to hold them both in either their open or closed position.

2. In a type-writer, the combination, with a paper-carriage and a cylindrical support or platen, of the pair of paper clamps or clips upon bent levers 5 7 pivoted to the carriage at 6, connected by retractile spring 11 and by pin and slot 8 9 or equivalent sliding articulation, as and for the purpose explained.

3. The combination of a platen, the paperclamping devices arranged on both sides thereof and positively connected together by their lower arms, and the spring connected to said clamping devices, substantially as set forth.

JAMES BRADY.

Witnesses:

CELIA F. DErGNAN, IRVINA M. GRANGER. 

